摘要
应用MM5V3．5中尺度非静力数值模式对2003年7月14-15日发生在陕西省一次区域性暴雨过程进行数值模拟和诊断分析,结果发现,西太平洋副热带高压西侧的暖湿气流和新疆冷空气是这次暴雨的主要影响系统,充沛的水汽输送、能量的积聚和强烈的上升运动为暴雨的发生提供了充分的条件,700hPa低涡、切变线是暴雨形成的触发机制。模拟结果表明:涡度场和散度场及垂直上升运动互耦;特强辐合辐散柱的出现早于强涡度柱,而深厚的强气旋性涡柱则几乎与暴雨最强盛时期同时出现。
A heavy rain event on 15 July 2003 in Shaanxi is simulated and diagnosed with MM5 nonhydrostatic model. It shows that there were obvious dynamic-thermodynamic structural features in the developmental phase and mature phase of the heavy rainfall, the strong divergence column and the intensive vorticity column were coupling developed, the extremely intensive ascent motion was intercoupled with saturated air column.
出处
《气象》
CSCD
北大核心
2005年第12期36-40,共5页
Meteorological Monthly
基金
科技部"陕西省干旱遥感监测与突发性暴雨监测预警系统研究"(2D01DIB20095)项目资助
关键词
山地灾害
突发性暴雨
数值模拟
诊断分析
disaster abrupt heavy rain numerical simulation diagnostic analysis
